What could cause the car to jerk during shifting in a 2018 Toyota Camry XV70?

Toyota Camry XV70 (2018-2024)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

649 words

Problem Statement

Learn about the causes and solutions for jerking during gear shifts in the 2018 Toyota Camry XV70, including diagnostic steps and repair instructions.

Affected Component

Transmission

Estimated Time

2-4 hours

Symptoms

•Noticeable jerking or lurching during gear shifts.
•Harsh or rough shifting, particularly between 1st and 2nd gear.
•Delayed engagement when accelerating from a stop.
•Unusual noises from the transmission during shifting (clunking, grinding).
•Warning lights on the dashboard, particularly the check engine or transmission warning lights.

Diagnostic Steps

1
Check the transmission fluid level and condition using the dipstick.
2
Look for any fluid leaks under the vehicle.
3
Inspect the wiring harness to the TCM for damage or corrosion.
4
Use an OBD-II scanner to check for any stored DTCs related to the transmission or engine.
5
Conduct a test drive to replicate the issue while observing the behavior of the transmission and engine.
6
If the fluid is dirty or burnt, it may need to be replaced.
7
Using a multimeter, check the voltage output of the TPS while moving the accelerator pedal.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Multimeter
•Transmission fluid dipstick
•Wrench set
•Socket set
•Fluid pump (for fluid change)
•Clean rags or shop towels
•Safety equipment (gloves, goggles, etc.)

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Symptoms

•Noticeable jerking or lurching during gear shifts.

•Harsh or rough shifting, particularly between 1st and 2nd gear.

•Delayed engagement when accelerating from a stop.

•Unusual noises from the transmission during shifting (clunking, grinding).

•Warning lights on the dashboard, particularly the check engine or transmission warning lights.

Diagnostic Steps

1
Check the transmission fluid level and condition using the dipstick.
2
Look for any fluid leaks under the vehicle.
3
Inspect the wiring harness to the TCM for damage or corrosion.
4
Use an OBD-II scanner to check for any stored DTCs related to the transmission or engine.
5
Conduct a test drive to replicate the issue while observing the behavior of the transmission and engine.
6
If the fluid is dirty or burnt, it may need to be replaced.
7
Using a multimeter, check the voltage output of the TPS while moving the accelerator pedal.

Solution

Car Jerking During Shifting in a 2018 Toyota Camry XV70

Potential Causes

Transmission Fluid Issues
- Low or dirty transmission fluid can cause erratic shifting.
Transmission Control Module (TCM) Malfunction
- A fault in the TCM can lead to improper shift timing and harsh engagements.
Worn Transmission Components
- Worn clutches or bands in the transmission can cause slippage and jerking.
Engine Misfire
- An engine misfire can affect the power delivery and make shifting feel harsh.
Faulty Throttle Position Sensor (TPS)
- A malfunctioning TPS can send incorrect signals to the engine control unit (ECU), affecting shifting.
Drivetrain Issues
- Problems with the driveshaft or differential can also manifest as jerking during shifts.

Tools Required

OBD-II scanner
Multimeter
Transmission fluid dipstick
Wrench set
Socket set
Fluid pump (for fluid change)
Clean rags or shop towels
Safety equipment (gloves, goggles, etc.)

Repair Instructions

Step 1: Check and Replace Transmission Fluid

Locate the Transmission Dipstick:
- With the engine running, remove the dipstick and check the fluid level.
Inspect Fluid Condition:
- If the fluid appears dark, burnt, or has a foul smell, it needs to be replaced.
Change Transmission Fluid:
- Place a drain pan under the transmission pan.
- Remove the drain plug or pan bolts to drain the old fluid.
- Replace the filter if applicable.
- Reinstall the drain plug and refill with new transmission fluid using the correct type specified in the owner’s manual.

Step 2: Inspect and Replace TCM (if needed)

Remove the Battery Negative Terminal:
- Disconnect the battery to avoid electrical shorts.
Access TCM:
- Locate the TCM (usually found near the transmission or under the dashboard).
- Disconnect the wiring harness from the TCM.
Remove TCM:
- Unscrew any bolts holding the TCM in place and remove it.
Install New TCM:
- Position the new TCM in place and secure it with bolts.
- Reconnect the wiring harness.
Reconnect Battery:
- Reattach the battery terminal and ensure all connections are secure.

Step 3: Test Drive

After completing repairs, take the vehicle for a test drive.
Ensure that the jerking during shifts has been resolved.

Conclusion

If the issue persists after following these steps, further diagnosis may be necessary to assess for internal transmission problems or other engine-related issues. Always consult the vehicle’s service manual for specific torque specifications and procedures. If you’re uncertain, consider seeking professional assistance to avoid further complications.